For the Dronelink app to run properly on a remote controller (such as the RC Pro, RC Pro Enterprise, RC Plus, Smart Controller) the DJI Pilot App must be Force Stopped.
Swiping up does not fully Force Stop the app.
Step 1 - Open Settings
Step 2 - Open Apps and Notifications
Step 3 - Select App to Force Stop (DJI Pilot 2)
Step 4 - Select Force Stop and OK